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Subject: Re: vacuum hold-down for exposure box

From: "warrenbrayshaw" <warrenbrayshaw@...>
Date: 2009-03-22

DJ Delorie wrote:

>
> I didn't feel much "suck" on the end of the tube with my finger, but
> the first time I hooked it up and tested it I saw the glass bow in so
> much I feared it would break! I just need to find out if I can run
> the shop vac with low air flow for the 5.5 minutes it takes to do an
> exposure.
>
>

Sounds like you need a calibrated hole :)

Just like a domestic vacuum cleaner, have a hole in the vacuum pipe to reduce the effective vacuum.

Warren